Solar Roofing Best Practices_Dec.2010
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For Solar Installations For Solar Installations Roofing Best Practices Roofing Best Practices Following Codes and Maintaining Quality Presented by Johan Alfsen Quick Mount PV
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Transcript of Solar Roofing Best Practices_Dec.2010
For Solar InstallationsFor Solar InstallationsRoofing Best PracticesRoofing Best Practices
Following Codes and
Maintaining Quality
Presented by Johan Alfsen Quick Mount PV
Problems in the Industry:
- Disconnect betweenSolar & Roofing Industry- Voided Roof Warranties- No Regulation- Outdated Technology- Cost/Competition- Lack of Training
Problems in the Industry:
What’s Wrong in This Picture?
“…80% of all construction relatedlitigation stems from water intrusion.”
- Rob HernandezPitched Roof RackingSolarProNovember 2008
It takes only a single leak to cause callbacks, a ruined job, or even a lawsuit.
Why Respect the Roof?
12/2/10 5
Think Like a Roofer• Solar installers need to think andact like roofers when they step onto aroof with a drill.
• Who would install a skylight or ventjack without complete waterproofflashing?
• How would a roofer approachmounting PV or solar thermal panelsto a customer’s roof?
• How do we maintain roofwarranties?
• What is “code” for solar mounts?
Wheel of Accountability
Source: www.quickmountpv.com
Important Roofing Codes
UBC & IBC: flashing requiredat all roof openings
NRCA “Best Practices”: noexposed fasteners
SMACNA: galvanized - notfor use on roofs exceeding15 year lifespan
*Also refer to ARMA & roofing manufacturersspecifications.
The Good, The Good, The Bad, The UglyThe Bad, The Ugly*None of these are code compliant*
The GoodThe Good, , The Bad, The UglyThe Bad, The UglyMust have flashing on all roof penetrations
2. Drill ¼” pilot hole for lag bolt
3. Add roof sealant to pilot hole 4. Slide Quick Mount into place
Composition / Asphalt RoofComposition / Asphalt Roof
1. Lift composite tile and clear nails
8. Move onto the next… 7. Attached preferred rails
5. Drive lag bolt into rafter 6. Add EPDM rubber gasket
Composition / Asphalt RoofComposition / Asphalt Roof
Good Example of a Code-Compliant Solar Racking System
Composition / Asphalt RoofComposition / Asphalt Roof
Most shake roofs consist of interlaid felt paperfor waterproofing
The QM Shake Mount 18x18 flashing isdesigned to slip under the felt paper
Wood Shake RoofWood Shake Roof
Good Example of a Code-Compliant Solar Racking System
Tile RoofsTile Roofs
Why Double Flashing?
Tile roofs are waterproof at underlayment. A primary flashing at theunderlayment level is critical.
Why Double Flashing?
Tile roofs must be waterproof at underlayment level AND top tole level
Good Example of a Code-Compliant Solar Racking System
Tile RoofsTile Roofs
The Best Insurance
• The vital importance of the solar rooftopmounting system is often overlooked andundervalued.
• Proper code compliance protects roofwarranties and the installer’s liability.
• Flashing is cheap insurance!!!
Wheel of Accountability
Source: www.quickmountpv.com
